Brake equalizer



C. S. MOBLEY BRAKE EQUALIZER June 18, 1929.

Filed Jan. 5, 1928 Patented June 18, 1929.

` UNITED STATES mrsNT 1 omer;

cLAUn s. MOBLEY, or DnTnoiT, Micnrenn; 'AssreneieTo GENERAL' MoTons conroRATroN, er DETROIT, momenti, n cenronATIoNor DELAWARE.

BRAKE narmtiznn.:k

specification andan examination of the accoinpanying drawing.

In the drawing: f

Figure 1 is a plan lview of the vehicle chassis with my novel brake mechanism associated therewith. ff i i Figure 2y is a side elevation.

Figure 3 shows the balancing inechanisin on an enlarged scale andin side elevation.

Figure 4 illustrates the sainev in end ele vation.

Referringby reference characters to the drawing, numeral 5 represents the side meinbers of a conventional chassis france. Nu-

nieral 7 illustrates one of the cross ineinbers thereof. Numerals 9 and 11 represent the front and rear axles respectively. A part of the motor is shown at 13, and and 17 are the front and rear wheels respectively.

Suitably j ournalled in the frame at a point midway between the front and rear ends of the vehicle is a rock shaft 19. This rock shaft has an upstanding arm 21 between its ends, the drawing'showing the rock shaft substantially in the longitudinal plane of the pedal 25. Between the pedal 25 and the rock shaft arm 21 is a connecting link 23 by means of which depression of the pedal causes a coun-y ter-clockwise rotation of shaft 19. After the depression of the pedal is relieved a spring 24, which may be connected to any convenient r 'point on the frame and to the pedal, restores the rock shaft to its former position, giving it a clockwise rotary movement.

Associated with each wheel 15 and 17 is a brake drum 27, and a fixed backing plate 29 is associated with the brake drum to house the brake actuating members' which engage the innerperiphery of the drum. The ineinber 29 is carried by the rear axle housing in case of the rear axle and by the steering knuckle for the front wheel brakes. Any

suitable actuating nieans as a cani, for` example, inay be. used within the housing defined by thedruin andthe backing plate. yThis cam is not illustrated as neither it nor t-he actuating brakey mechanism within" kthe `druin constitutes any part of the invention. This brake actuating ineansis shown inthe drawlng as carried by shaft 31'projecting through the backing plate where itis providedwith an actuatingarni 33. This `structure iscommonto both :the front andrear wheels. Ex-

brake yand forwardlyk from the rear ywheel brake are connecting links 35. On each end of rock shaft 19 outside the frame nieinbers 5y are rigidly securedv arms37 which, as shown in .the` drawing, extend upwardly and are bowed forwardly.` Rotatable on shaft`19 ad-y jacent each arm 37 isa lever 39. This lever projects downwardlyand atits lower end vis connected tol the connecting link 35 which extends from the front brake rearwardly. The upper end of each rigid arm 37is deflected from the plane ofits shaft attaching portion into the plane of lever' 39. This'is illustrated perhaps best in Figure L4. To' the upper .tending rearwardly from kthe front wheel sek end of ar1n37 is pivoted a lever`43.L Lever n 43 at its upper end is connected by link '35 with arm 33 extending from the cam shaft 31 of the rear wheel brake.r The lower end of lever 43 and the upper end of lever`39 are positioned in contact with each other for the purpose of communicating motion, the e one to the other, to effect an equalized braking i action between the brakes at the front and at the rear of the vehicle in a manner which` is well known and which will be wellunderstood.

It is proposed to construct lever 43 as follows. Two plates 47 are spaced'on either side of an arm 45' secured Vbetweeny the plates by suitable fastening means 51. This construcf tion is shown in Figures 3 and 4. A pivot pin 55 is used to pivotally mount the two plates 47 on the rigid arm 37, the plates V47 lying on ropposite sides of the deiiected por-` tion of the fixed arm 37 and' engaging the i ends of the pivot pin 55 which project fromk the plane of the arm 37 By this means a very well reinforced `'pivotal connection is made for the upper pivotal connection between lever 43 and arm 37. Suflicient rigidity is afe forded to the projecting arm 45 and the lower end of 45 constitutes the point of connection with lever 39, this point of connection lying between the two plates 47 with the result that'Y they coplanar relation betweenlever 39 and arm 45, constituting a part of lever43, is .as vs ured. Itvwillbe observed that the construction of this upper lever member 43 is quite l an importantfeature of the invention in that itV is so related to the pivotal armas to swing in a fixed plane and it, by its construction,

- y ensures the coplanai relation between the lever 39 and the lever 43, which relation is necessary for producing equalization between the front and rear brakes. Furthermore,

this construction is extremely simple and 'f Veconomical to manufacture.

f y 2,5 which" rocks shaft l9with its arms'37 Y The The brake is applied by depression of pedal 1 rock shaft rotating infla clockwise direction pulls upon links 35 and applies both brakes,

front and rear.y Should one `brake offer more resistance than thev other, as in the case, of

' somewhat worn brake linings,equalization is effected bymeans. of pressure being exerted i between theadjacentends oflevers 43 and 39.

. I claim:

Y' '1.Brake kmechanism comprising a rock shaft, means to rocksaid rock shaft, .terminal Varmson saidrock shaft,va lever rotatablysupported on each of said KVarms, ,a second lever mountedV on said rockshaft adjacent each of saidV arms,zmeans Vconnecting each'of said levers to aw brake, the ends of said levers', remote Yfrom their `points of "connection withisaid connecting means being con-v tact whereby to produce' a balanced `action Vbetween the brakes,-each of said terminal armsbeing Adistorted kfrom the plane of its shaft attaching portion intoY the planeof the secondv lever, said first lever including members engaging opposite facesv of said terminal arms adjacent the pivot, said first lever stituting a part of the first lever'.

2. ,Brake operating mechanism for vehicles, comprising a rock shaft, terminal arms secured thereto, iirstrlevers rotatably mounted on each of the arms, second levers rotatably mounted on'said shaft one adjacent each arm, the first and second levers at each endfof saidk shaft lying 1n a common plane, adjacent ends of said levers being in contact,

'opposite ends being connected to brakes, and

means associated with one of said levers to maintain a coplanar relation between saidV levers. n K

3. Brake mechanism comprising a rock shaft, means to rock said rock shaft terminal .arms on said rock shaft, a leverrotatably supported on each offsaid arms, a second leof said arms, means connecting each 'ofsaid Y levers tothe brake, the end's of said leversrcmote lfrom their points ofconnection with the brake connecting means. being Vin contact whereby to produce a balanced action between the brakes, eachof said terminal arms being distorted from the planerof its'vshaft-attaching portion intothe plane of the second lever,

said iirst lever including members engaging opposite faces of said terminal arms adjacent the pivot betweensaid arms and members.

In testimony whereof I aflix my signature.

` CLAUD. S. MOBLEY.

lvei' mount-ed on said rock shaft adjacent each -1 

